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<!DOCTYPE html>
<html>
<body>
<?php 
$str = "Hello"; 
echo "The string: ".$str."<br>"; 
echo "TRUE - Raw 20 character binary format: ".sha1($str, TRUE)."<br>"; 
echo "FALSE - 40 character hex number: ".sha1($str)."<br>"; 
?>
</body>
</html>
The string: Hello
TRUE - Raw 20 character binary format: ����{���p�Z]x^ ���
FALSE - 40 character hex number: f7ff9e8b7bb2e09b70935a5d785e0cc5d9d0abf0